Is this all a scam?

So my last name is French (not literally). I recently found out my father was adopted and his biological father’s last name is Smith. Can someone shed some light on this and help me out. Also the “DNA Relatives” are all what seem to be literal random people. None of which accept invites or message me back. It says one person is my great uncle to first cousin but I’ve never heard of this person before and Facebook shows he’s 8 states away with zero mutual friends.